/**
 * \file
 * Functions and types for CRC checks.
 *
 * Generated on Mon May 11 21:01:21 2020
 * by pycrc v0.9.2, https://pycrc.org
 * using the configuration:
 *  - Width         = 32
 *  - Poly          = 0x04c11db7
 *  - XorIn         = 0xc55c0000
 *  - ReflectIn     = True
 *  - XorOut        = 0x00000000
 *  - ReflectOut    = True
 *  - Algorithm     = table-driven
 */
#include "custom_crc32.h"     /* include the header file generated with pycrc */
#include <stdlib.h>
#include <stdint.h>



/**
 * Static table used for the table_driven implementation.
 */
static const crc32_t crc32_table[256] = {
        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
        0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
        0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
        0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
        0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
        0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
        0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
        0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
        0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
        0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
        0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
        0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
        0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
        0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
        0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
        0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
        0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
        0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
        0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
        0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
        0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
        0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
        0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
        0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
        0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
        0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
        0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
        0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
        0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
        0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
        0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
        0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};


crc32_t crc32_update(crc32_t crc, const void *data, size_t data_len)
{
    const unsigned char *d = (const unsigned char *)data;
    unsigned int tbl_idx;

    while (data_len--) {
        tbl_idx = (crc ^ *d) & 0xff;
        crc = (crc32_table[tbl_idx] ^ (crc >> 8)) & 0xffffffff;
        d++;
    }
    return crc & 0xffffffff;
}



#include <stdio.h>
#include <getopt.h>
#include <stdbool.h>
#include <string.h>

static uint8_t str[] = {
        0xAA, 0x1A, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
        0x22, 0x11, 0xA2, 0x42, 0x0E, 0x00, 0x20, 0x00,
        0x30, 0x00, 0x40, 0x00, 0x01, 0x14,
};
static bool verbose = false;


static int get_crc32_config(int argc, char *argv[])
{
    int c;
    int option_index;
    static struct option long_options[] = {
            {"verbose",         0, 0, 'v'},
            {0, 0, 0, 0}
    };

    while (1) {
        option_index = 0;

        c = getopt_long(argc, argv, "w:p:n:i:u:o:s:vt", long_options, &option_index);
        if (c == -1)
            break;

        switch (c) {
            case 0:
                printf("option %s", long_options[option_index].name);
                if (optarg)
                    printf(" with arg %s", optarg);
                printf("\n");
                break;
            case 'v':
                verbose = true;
                break;
            case '?':
                return -1;
            case ':':
                fprintf(stderr, "missing argument to option %c\n", c);
                return -1;
            default:
                fprintf(stderr, "unhandled option %c\n", c);
                return -1;
        }
    }

    return 0;
}


static void print_crc32_params(void)
{
    char format[20];

    snprintf(format, sizeof(format), "%%-16s = 0x%%0%dllx\n", (unsigned int)(32 + 3) / 4);
    printf("%-16s = %d\n", "width", (unsigned int)32);
    printf(format, "poly", (unsigned long long int)0x04c11db7);
    printf("%-16s = %s\n", "reflect_in", "true");
    printf(format, "xor_in", (unsigned long long int)0xc55c0000);
    printf("%-16s = %s\n", "reflect_out", "true");
    printf(format, "xor_out", (unsigned long long int)0x00000000);
    printf(format, "crc_mask", (unsigned long long int)0xffffffff);
    printf(format, "msb_mask", (unsigned long long int)0x80000000);
}


/**
 * C main function.
 * \param[in] argc the number of arguments in \a argv.
 * \param[in] argv a NULL-terminated array of pointers to the argument strings.
 * \retval 0 on success.
 * \retval >0 on error.
 */
int main32(int argc, char *argv[])
{
    crc32_t crc;

    get_crc32_config(argc, argv);
    crc = crc32_init();
    crc = crc32_update(crc, (void *)str, sizeof(str));
    crc = crc32_finalize(crc);

    if (verbose) {
        print_crc32_params();
    }
    printf("0x%llx\n", (unsigned long long int)crc);
    return 0;
}
